Doctrine 2 lazy loading won't work - doctrine-orm

Question

I'm starting with Doctrine 2 and I'm trying to make this simple case working: a Series has a title, which is a MultilingualText (encapsulates the English and French titles).
I'm loading a Series, but when I try to get its French title, the lazy loading doesn't work.
Here is the Series code:
class Series {
/**
* #Id #Column(type="smallint", name="seriesId")
* #GeneratedValue
*/
private $seriesId;
/**
* #OneToOne(targetEntity="MultilingualText")
* #JoinColumn(name="title", referencedColumnName="multilingualTextId")
**/
private $title;
public function getTitle() {
return $this->title;
}
public function setTitle(MultilingualText $title) {
$this->title = $title;
}
}
Now the MultilingualText code:
class MultilingualText {
/**
* #Id #Column(type="smallint", name="multilingualTextId")
* #GeneratedValue
*/
private $multilingualTextId;
/** #Column(type="text") */
private $frenchText;
/** #Column(type="text") */
private $englishText;
public function getFrenchText() {
return $this->frenchText;
}
public function setFrenchText($frenchText) {
$this->frenchText = $frenchText;
}
}
Now the loading, which doesn't work:
$series = $entityManager->find('Series', 1);
echo $series->getTitle()->getFrenchText();
Surprisingly however, this does work:
$multilingualText = $entityManager->find('MultilingualText', 1);
echo $multilingualText->getFrenchText() . "<br/>";
$series = $entityManager->find('Series', 1);
echo $series->getTitle()->getFrenchText();
Result:
My French title
My French title
From this test, I conclude that lazy loading doesn't work in this context, but no idea why...
Any help would be much appreciated
Thanks
Mat

Answer 1

I found the thing: dev mode was set to false...
This simple line is damn important!
$isDevMode = true;